BRIEF OHNE UMSCHLAG Eggeling, Heinrich Author: Eggeling, Heinrich Recipient: Haeckel, Ernst Dating: 20.10.1900
BRIEF OHNE UMSCHLAG Eggeling, Heinrich Author: Eggeling, Heinrich Recipient: Haeckel, Ernst Dating: 01.03.1900
BRIEF OHNE UMSCHLAG Eggeling, Heinrich Author: Eggeling, Heinrich Recipient: Haeckel, Ernst Dating: 12.01.1900